2102020021121 has 8 divisors (see below), whose sum is σ = 2128003276800. Its totient is φ = 2076190969248.

The previous prime is 2102020021103. The next prime is 2102020021133. The reversal of 2102020021121 is 1211200202012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102020021121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102020021096 and 2102020021105.

It is not an unprimeable number, because it can be changed into a prime (2102020021141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38523521 + ... + 38578046.

It is an arithmetic number, because the mean of its divisors is an integer number (266000409600).

Almost surely, 2^{2102020021121} is an apocalyptic number.

It is an amenable number.

2102020021121 is a deficient number, since it is larger than the sum of its proper divisors (25983255679).

2102020021121 is a wasteful number, since it uses less digits than its factorization.

2102020021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77101903.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2102020021121 its reverse (1211200202012), we get a palindrome (3313220223133).

The spelling of 2102020021121 in words is "two trillion, one hundred two billion, twenty million, twenty-one thousand, one hundred twenty-one".